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. Author manuscript; available in PMC: 2020 Aug 10.
Published in final edited form as: Semin Musculoskelet Radiol. 2020 Jan 28;24(1):12–20. doi: 10.1055/s-0039-3400265

Fig. 4.

Fig. 4

From left to right: A single slice of the reference, zero-filled, parallel imaging compressed sensing (PI-CS), classic variational network (VN) and U-Net-VN reconstructions of a coronal proton-density-weighted knee image. The displayed structural similarity index measure values were calculated for the presented slice. Both the VN and U-Net-VN have improved image quality compared with the PI-CS reconstruction. The U-Net-VN outperforms the classic VN in that it is often sharper and has fewer residual artifacts.